global function used in system software version 1.x is obsolete; it is

supported in version 2.0, but support is not guaranteed in future releases. Use the new

PopupMenu

function instead.

Picker Categories

6

The remainder of this chapter divides the pickers into a number of categories. The protos within each category operate in a related manner. General-purpose protos are used to create simple, general-purpose pickers and pop-up views. The remaining protos in the list are triggered by specific user actions or by events that you define:

general-purpose pickers

map pickers

text pickers

date, time, and location pickers

number pickers

picture picker

overview protos

roll protos

There is also a section discussing the view classes used with pickers.

General-Purpose Pickers

6

You use the protos described in this section to create simple, general-purpose pickers and pop-up views. Some of the following protos are triggered by specific user actions, while others are triggered by events that you define:

The

protoPopupButton

picker is a text button that displays a picker when

tapped. The button is highlighted while the picker is open. For information about the slots and methods for this picker, see "protoPopupButton" (page 5-4) in Newton Programmer's Reference. Figure 6-1 shows an example of a